Caveat: Display window

Note that vertical shrinking does not affect the tile height setting of the sprite. The graphics are shrunk inside the defined window.

Sprite height set to 4 tiles, graphics intentionally filling 4 tiles

The same sprite updated to be only 3 tiles high without clearing the 4th (yellow) tile

The sprite will shrink this way, showing the garbage yellow tile from the previous setup

Caveat: Last line repeat

If the display window of a vertically shrinked sprite is taller than the shrunk graphics, the remaining lines will be filled with repeats of the last line of the last tile (the bottom line of the tile at map index 15).

SNK recommends leaving that line fully transparent if this causes problems.

Horizontal shrinking

The horizontal shrinking is set by a 4-bit value indicating the final width of the sprite graphics +1 (giving 1 to 16 pixels wide sprites). This value is also set in SCB2.